（华蓝设计集团有限公司， 南宁 530011） 

［摘要］针对在实际工程中采用钻芯法检测大直径嵌岩桩所遇到的桩端持力层与勘察和设计不符，且取不出用于检测岩石强度及承载力的桩端岩芯芯样，桩身强度不满足设计要求等，因而无法确定单桩竖向承载力这一难题，提出新的检测方案。并通过加设芯桩提高了该桩的桩身承载力及桩端承载力，避免因异位补桩而造成的设计困难及工期、造价大幅增加的问题。

［关键词］大直径嵌岩桩； 钻芯法检测； 补充检测； 加固办法

中图分类号： TU473.1    文献标识码： A    文章编号： 1002-848X(2015)S2-0213-04

Discussion on vertical bearing capacity identification and reinforcement method of

 large diameter embedded rock pilesChen Wenqiang

(Hualan Group Co., Ltd., Nanning 530011, China)

Abstract: According to the problems that bearing course at pile end of large diameter embedded rock pile encountered in actual engineering by drilling core method detection does not match that of survey and design, no taking core core sample used for the detection of rock strength and bearing capacity of pile end, and pile strength does not meet the design requirements, therefore it′s unable to determine the vertical bearing capacity of single pile, new detection scheme was proposed. The bearing capacity of pile body and pile end bearing capacity of he pile were improved through adding core pile which avoids the design difficulties and substantial increase of construction time and the cost caused by ectopic filling pile for a project.

Keywords: large diameter embedded rock pile; drilling core detection; supplementary detection; reinforcement method